Tertiary Hydroxyl Acrylate Ink for Bleed-Free Curing
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Solution Overview
Problem
Conventional active-energy-ray-curable inkjet recording methods face issues with ink bleeding and poor drying ability on absorbable recording media, leading to odor concerns and suboptimal curing performance.
Innovation Solution
An active-energy-ray-curable composition containing a (meth)acrylic acid ester compound with a tertiary hydroxyl group, as represented by General Formula (1), which enhances polymerizing ability and curing efficiency while minimizing odor, is developed. This composition includes a multifunctional monomer with two (meth)acrylic acid ester structures and one or two tertiary hydroxyl groups, facilitating cross-linking and improving intermolecular interaction for better curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active-energy-ray-curable inkjet recording methods are used, then inkjet recording can be performed, but ink bleeding occurs and drying ability is poor
Solution Approach 1:
The patent changes the chemical parameters of the ink composition by incorporating specific compounds: a multifunctional monomer containing secondary or tertiary hydroxyl groups, a hetero atom-containing polymerizable monomer compound that forms hydrogen bonds with the hydroxyl groups, and a polymerizable isocyanate compound. This chemical composition modification resolves the contradiction by improving drying ability while preventing ink bleeding through enhanced intermolecular interactions and cross-linking.
Solution Approach 2:
The patent creates a composite ink formulation by combining multiple functional components: the multifunctional monomer (with hydroxyl groups), the hetero atom-containing monomer (forming hydrogen bonds), and the polymerizable isocyanate compound (providing cross-linking). This composite material approach synergistically improves both drying ability and prevents ink bleeding, resolving the technical contradiction between these two properties.
2Ease of manufacture
If conventional ink compositions are used, then inkjet recording can be performed, but odor is generated
Solution Approach 1:
The patent modifies the chemical composition parameters by selecting specific compounds with lower volatility and odor characteristics. The use of multifunctional monomers with secondary or tertiary hydroxyl groups, combined with hetero atom-containing monomers and polymerizable isocyanate compounds, creates a formulation that maintains inkjet recording capability while significantly reducing odor generation during storage and application.
3Reliability
If conventional ink compositions are used, then inkjet recording can be performed, but active energy ray polymerizing ability and curing ability are suboptimal
Solution Approach 1:
The patent optimizes the chemical parameters of the ink composition by incorporating compounds with specific functional groups that enhance photopolymerization. The multifunctional monomer with secondary or tertiary hydroxyl groups provides multiple polymerization sites, while the hetero atom-containing monomer and polymerizable isocyanate compound contribute to cross-linking density. This composition optimization simultaneously improves both polymerizing ability (speed) and curing ability (final properties) under active energy ray irradiation.
Solution Approach 2:
The patent employs multifunctional monomers that serve multiple roles: they provide hydroxyl groups for hydrogen bonding (improving drying), contain polymerizable groups for cross-linking (improving curing ability), and enable rapid polymerization under active energy rays (improving productivity). This multi-functionality resolves the contradiction between curing ability and polymerizing ability by having a single compound class address both requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition achieves excellent active energy ray polymerizing and curing abilities with reduced odor, preventing ink bleeding and enhancing drying efficiency, thus addressing the limitations of conventional methods.
Implementation Method 1
an active-energy-ray-curable composition which contains a (meth)acrylic acid ester compound containing a tertiary hydroxyl group in a molecule of the (meth)acrylic acid ester compound and represented by General Formula (1)
Implementation Method 2
a hetero atom capable of reacting the hydroxyl group with the hetero atom to form a hydrogen bond in a molecular thereof
Data Source
Figure 1~2
Figure 3A~3D
AI summary
An active-energy-ray-curable composition including a (meth)acrylic acid ester compound containing a tertiary hydroxyl group in a molecule of the (meth)acrylic acid ester compound and represented by General Formula (1) below, where in the General Formula (1), OH represents a tertiary hydroxyl group, m and n represent an integer of a range of from 1 through 2, R1 represents a hydrogen atom or a methyl group, and X represents a group formed of an aliphatic hydrocarbon containing from 4 through 10 carbon atoms or a group formed of an aliphatic cyclic hydrocarbon containing from 4 through 10 carbon atoms.